Main study parameter/Endpoints: Change in Hb concentration is the primary outcome of this study. Body iron measured by serum ferritin (SF) and serum transferrin receptor (STfR) are the secondary outcome. Iron deficiency will be defined as SF concentration <12 µg/L and tissue iron deficiency will be defined as serum transferrin receptor concentration of >8.3mg/L. Infection will be assessed by raised CRP (>10mg/L) as an indicator of acute inflammation and presence of malaria.